Abstract
Sericin was obtained from Bombyx mori cocoons in 28% yield with 92.06% purity. Its hydrolysate was produced by an enzymatic method. A fraction with molecular mass < 3 kDa was collected using ultrafiltration. The contents of 19 peptides with molecular masses in the range 600–3000 Da were determined using MALDI TOF/TOF. Their amino-acid sequences were found. The antioxidant activity of sericin hydrolysate (IC50) was 0.07 mg/mL according to absorption of ABTS radicals and 1.09 mg/mL according to absorption of OH radicals. These were 4.5 and 1.2 times greater, respectively, than that of sericin.
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